I. Non-medellian pattern of inheritance describes how multiple alleles and polygenes are involved in the
determination of phenotypes. Which form of inheritance in which both allcles are expressed equally in
the phenotype of the heterozygote?
A. Codominance
B. Incomplete Dominance
C. Multiple alleles
D. Sex
Determination
2. A centromere is an essential part of a chromosome. Which of the following best describes a centromere?
san
A. The
longest arm of the chromosome.
B. The
The part of the DNA where the genes are found.
C. The part of the cell where the chromosome is located.
D. The point in the chromosome that joins together the two chromatids.
3. Sex-limited traits and sex-influenced traits are both sex-related inheritance. What is the difference
between sex-limited and sex-influenced traits?
A. Sex-limited traits can either be in the both sexes while sex-influenced traits are expressed in
B. Sex-limited traits are exclusively in one sex while sex-influenced traits are expressed in both
sexes.
C. Sex-influenced traits are expresses in males only while sex-limited traits are in females only.
D. Sex-influenced traits can be only be female while sex-limited traits are both sexes.
4. Color blindness is an example of a sex-linked trait. Which shows the genotype of a
colorblind man?
A. XX
B. XX
C. XCY
D. X Y
5. In a paternity case, a single mother claimed that a certain man the father of her baby. The man
denied it, claiming that her current boyfriend was the father. The court ordered a blood test (much
cheaper than DNA testing) to see if he could be ruled out as the father. Both the mother and the baby
had blood type "O". The man was Type "AB". Is it possible that he was the father?
A. No, the man's genotype is llb.
B. Yes, the man's genotype must be carrying ii.
C. No, nothing in science can be proven absolutely.
D. Yes, only the mother's blood type will be inherited regardless of the father.
6. All are environmental factors that influence an individual's traits and characteristics EXCEPT ONE:
A. chemicals
B. drugs
C. genes
D. Temperature
7. DNA is a double-stranded helix made up of repeating units of nucleotides. Which of the following in
NOT a composition of a nucleotide?
A. Nitrogen base
B. Phosphate molecules
C. Salt
D. Sugar.